Senior Software Engineer Jobs in Markham, ON (NOW HIRING)

• As a Senior Software Engineer, you will play a key technical leadership role within the AutoSync engineering organization. you will design, build, and evolve scalable backend services and user-facing features across our product suite.
• You will contribute across a polyglot stack that includes PHP (Laravel), JavaScript, and TypeScript, collaborating closely with product managers, designers, and other engineers to deliver robust, maintainable, and secure solutions.
• This role requires a high level of proficiency in using AI tools in day-to-day software development. AI-assisted workflows are not optional-they are an expected part of how we design, implement, test, debug, document, and optimize software. As a senior engineer, you will also help elevate your team's AI capabilities by modeling effective usage patterns and sharing best practices.

• Architect, design, and implement scalable services and product features using PHP (Laravel) 
• Build and maintain frontend features using JavaScript and TypeScript
• Use AI tools extensively for code generation, refactoring, test creation, debugging, performance optimization, and documentation
• Critically evaluate AI-generated outputs to ensure correctness, security, maintainability, and alignment with architectural standards
• Lead technical design discussions and contribute to system and API architecture decisions
• Own complex features end-to-end, from technical design through deployment, monitoring, and iteration
• Drive improvements in code quality, performance, reliability, and security
• Write clean, maintainable, and well-tested code with strong automated test coverage
• Conduct in-depth code reviews and mentor engineers through actionable feedback
• Coach teammates on effective and responsible AI usage in software engineering workflows
• Collaborate cross-functionally to translate business requirements into scalable technical solutions
• Contribute to cloud infrastructure and services (AWS), ensuring high availability and operational excellence
• Participate in compensated on-call rotations to ensure platform reliability
• Champion DevOps best practices, CI/CD improvements, and observability standards
• Identify and lead technical initiatives that improve long-term platform sustainability

• 6-8 years of extensive professional experience in backend software development
• Strong expertise in PHP and Laravel
• Proficiency in JavaScript and TypeScript for modern frontend development
• Demonstrated, advanced proficiency using AI tools in day-to-day engineering work (code generation, debugging, test automation, documentation, architectural exploration)
• Strong ability to validate, refine, and productionize AI-assisted outputs
• Experience improving team-level engineering practices
• Deep understanding of API design, distributed systems, and scalable architecture patterns
• Experience working with AWS or similar cloud environments
• Strong knowledge of CI/CD pipelines and modern DevOps practices
• Experience designing and optimizing relational databases and data models
• Proven ability to independently lead complex technical initiatives
• Strong problem-solving skills and ability to navigate ambiguity
• Clear and effective communication skills
• Participate in compensated on-call rotations to ensure reliability of our backend services

• Experience integrating AI capabilities into production products (e.g., LLM integrations, AI-driven features, intelligent workflows)
• Experience designing AI-enabled user experiences or backend AI services
• Experience in automotive, dealer software, or SaaS platforms
• Experience with containerization (Docker, Kubernetes)
• Event-driven architectures and messaging systems
• Performance tuning and high-scale system optimization
• Experience working in multi-product platform environments
• Bilingual English - French  good to have

• A collaborative, high-performing engineering culture
• A strong emphasis on modern AI-augmented engineering practices
• Opportunity to influence architecture and technical direction across a product suite
• Challenging and meaningful projects that impact automotive dealers directly
• Continuous learning and leadership growth opportunities

What's In It For You?

We understand that there is life at work and life outside of work. Here are a few benefits we all benefit from that support us to be our creative best. 

 Benefits from Day 1 

• Gym discounts
• Employee and Family Assistance program
• Virtual wellness events
• Conferences & training budget
• Regular internal training programs
• Financial planning with 3% matching Pension  
• Competitive salary
• Annual bonus structure 

For a career where you can drive our business and shape your future, apply now.